The Properties of High Flowing and Strength Concrete Utilizing Crushed Sand for CFT Structure

부순모래를 사용한 CFT 구조용 고유동.고강도콘크리트의 물성 변화

  • 안남식 (세종대학교 건축공학과) ;
  • 임홍철 (연세대학교 건축공학과) ;
  • 임혜선 (연세대학교 건축공학과 첨단구조연구실)
  • Published : 2006.05.01

Abstract

To investigate the properties of high flowing and high strength concrete with crushed sand and fly ash for CFT structure, many batches were performed by a trial-error method. In the experiment W/B was set up three levels as 0.25, 0.30 and 0.35. Also the variables of the experiment were a substitution ratio of fly ash, a blend ratio of crushed sand and the ages of specimens(3, 7, 28 days). The results of this study are summarized as the follows; 1) The effect a substitution ratio of fly ash on the compressive strength was not consistent with age. For twenty-eight day compressive strength, the best result was come out when cement was substituted by 10% of fly ash. 2) The decrease of the water binder ratio, the increase of compressive strength and elastic modulus. Also the relationship is very similar to the case of a normal concrete

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